FR2411462A1 - Porteur d'information en forme de disque presentant des couches de recouvrement - Google Patents

Porteur d'information en forme de disque presentant des couches de recouvrement

Info

Publication number
FR2411462A1
FR2411462A1 FR7834815A FR7834815A FR2411462A1 FR 2411462 A1 FR2411462 A1 FR 2411462A1 FR 7834815 A FR7834815 A FR 7834815A FR 7834815 A FR7834815 A FR 7834815A FR 2411462 A1 FR2411462 A1 FR 2411462A1
Authority
FR
France
Prior art keywords
information carrier
disc
radiation
metal
cover layers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7834815A
Other languages
English (en)
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2411462A1 publication Critical patent/FR2411462A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
    • G11B7/2542—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers consisting essentially of organic resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
    • G11B7/2572—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of organic materials
    • G11B7/2575—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of organic materials resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2333/00—Polymers of unsaturated acids or derivatives thereof
    • B32B2333/04—Polymers of esters
    • B32B2333/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2369/00—Polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2429/00—Carriers for sound or information
    • B32B2429/02—Records or discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
    • G11B7/2585—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on aluminium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31507—Of polycarbonate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31645—Next to addition polymer from unsaturated monomers
    • Y10T428/31649—Ester, halide or nitrile of addition polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y10T428/31699—Ester, halide or nitrile of addition polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31928—Ester, halide or nitrile of addition polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31935—Ester, halide or nitrile of addition polymer

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
FR7834815A 1977-12-12 1978-12-11 Porteur d'information en forme de disque presentant des couches de recouvrement Withdrawn FR2411462A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7713710A NL7713710A (nl) 1977-12-12 1977-12-12 Schijfvormige informatiedrager met afdeklagen.

Publications (1)

Publication Number Publication Date
FR2411462A1 true FR2411462A1 (fr) 1979-07-06

Family

ID=19829735

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7834815A Withdrawn FR2411462A1 (fr) 1977-12-12 1978-12-11 Porteur d'information en forme de disque presentant des couches de recouvrement

Country Status (11)

Country Link
US (1) US4188433A (de)
JP (1) JPS5489704A (de)
AT (1) ATA879778A (de)
AU (1) AU4235778A (de)
DE (1) DE2853262A1 (de)
ES (1) ES475871A1 (de)
FR (1) FR2411462A1 (de)
GB (1) GB2009996A (de)
IT (1) IT1100796B (de)
NL (1) NL7713710A (de)
SE (1) SE7812634L (de)

Families Citing this family (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7611395A (nl) * 1976-10-15 1978-04-18 Philips Nv Werkwijze voor het vermenigvuldigen van kunst- stof informatiedragers alsmede een in deze werkwijze toegepaste giethars, substraat en matrijs.
NL7803069A (nl) * 1978-03-22 1979-09-25 Philips Nv Meerlaags informatieschijf.
NL7804036A (nl) * 1978-04-17 1979-10-19 Philips Nv Optisch uitleesbare informatieschijf.
JPS5522961A (en) * 1978-08-07 1980-02-19 Fuji Photo Film Co Ltd Thermal recording material
DE2966968D1 (en) * 1978-08-28 1984-06-14 Discovision Ass Method for moulding a videodisc composition
US4441179A (en) * 1979-01-15 1984-04-03 Discovision Associates Optical video disc structure
US4310919A (en) * 1979-01-15 1982-01-12 Discovision Associates Optical video disc structure
NL7904113A (nl) * 1979-05-25 1980-11-27 Philips Nv Optisch uitleesbare informatieschijf, werkwijze voor de vervaardiging ervan alsmede een inrichting voor het uitvoeren van deze werkwijze.
US4268840A (en) * 1979-07-27 1981-05-19 Xerox Corporation Optical recording member
US4380558A (en) * 1979-10-02 1983-04-19 Nippon Electric Co., Ltd. Process for manufacturing a protective polysilicate layer of a record member by a laser beam and a magnetic record member suitably manufactured thereby
US4407880A (en) * 1979-11-07 1983-10-04 Hitachi, Ltd. Substrate of member for recording information with light and method of manufacturing the same
US4304806A (en) * 1980-02-01 1981-12-08 Minnesota Mining And Manufacturing Company Information carrying discs
EP0044840B1 (de) * 1980-02-01 1985-06-26 Minnesota Mining And Manufacturing Company Informationen tragende platten
NL8002039A (nl) * 1980-04-08 1981-11-02 Philips Nv Optisch uitleesbare informatieschijf.
JPS56169238A (en) * 1980-05-28 1981-12-25 Sharp Corp Magnetooptical storage disk
JPS5727494A (en) * 1980-07-23 1982-02-13 Sharp Corp Magneto-optical storage element
US4319252A (en) * 1980-07-21 1982-03-09 Drexler Technology Corporation Optical data storage and recording medium having a replaceable protective coverplate
JPS5727451A (en) * 1980-07-23 1982-02-13 Sharp Corp Magnetooptic storage element
DE3028498A1 (de) * 1980-07-26 1982-03-04 Röhm GmbH, 6100 Darmstadt Verbesserte, optisch abzulesende, informationsspeicherplatten und verfahren zu ihrer herstellung
US4519065A (en) * 1980-09-22 1985-05-21 Minnesota Mining And Manufacturing Company Metallized information carrying discs
US4363844A (en) * 1980-09-22 1982-12-14 Lewis Terry W Metallized information carrying discs
JPS5766538A (en) * 1980-10-08 1982-04-22 Toshiba Corp Information storage medium
NL8005674A (nl) * 1980-10-15 1982-05-03 Philips Nv Optisch uitleesbare informatieschijf.
JPS57130243A (en) * 1981-02-05 1982-08-12 Toshiba Corp Information storage medium
JPS5933320B2 (ja) * 1981-04-03 1984-08-15 株式会社東芝 光学的情報記録媒体
JPS57169938A (en) * 1981-04-10 1982-10-19 Sony Corp Optical type recording medium
NL8102283A (nl) * 1981-05-11 1982-12-01 Philips Nv Optisch uitleesbare informatieschijf met een reflectielaag gevormd uit een metaallegering.
JPS58108044A (ja) * 1981-12-22 1983-06-28 Pioneer Electronic Corp 光学式デイスク
US4510593A (en) * 1982-10-18 1985-04-09 Minnesota Mining And Manufacturing Company Information disk of grooved, metal-coated crosslinked polymeric layer
JPS5977647A (ja) * 1982-10-26 1984-05-04 Matsushita Electric Ind Co Ltd 光学式円盤
US4584259A (en) * 1982-12-17 1986-04-22 Burroughs Corporation Coated media for optical recording with acrylic overcoat
JPS59203253A (ja) * 1983-05-04 1984-11-17 Matsushita Electric Ind Co Ltd 光デイスクおよびその製造方法
JPH0636253B2 (ja) * 1983-08-18 1994-05-11 シャープ株式会社 光メモリ円板
DE3337890A1 (de) * 1983-10-19 1985-05-09 Röhm GmbH, 6100 Darmstadt Formmassen fuer optisch ablesbare datentraeger
US4637904A (en) * 1983-11-14 1987-01-20 Rohm And Haas Company Process for molding a polymeric layer onto a substrate
JPS6190343A (ja) * 1984-10-09 1986-05-08 Polyplastics Co 光ディスク
US4650743A (en) * 1985-07-31 1987-03-17 E. I. Du Pont De Nemours And Company Optical coating composition
DE3681366D1 (de) * 1985-07-31 1991-10-17 Du Pont Optische beschichtungszusammensetzung.
US4950520A (en) * 1985-12-27 1990-08-21 Pioneer Electronic Corporation Optical recording medium and method manufacturing thereof
US4700840A (en) * 1986-02-14 1987-10-20 Drexler Technology Corporation Data card cassette
JP2565196B2 (ja) * 1986-09-30 1996-12-18 ソニー株式会社 記録装置及び記録方法
US5128388A (en) * 1987-11-30 1992-07-07 Sunstar Giken Kabushiki Kaisha Hot melt adhesive crosslinkable by ultraviolet irradiation, optical disc using the same and process for preparing thereof
JPH03225650A (ja) * 1990-01-31 1991-10-04 Sony Corp 光ディスクシステム
US5392263A (en) * 1990-01-31 1995-02-21 Sony Corporation Magneto-optical disk system with specified thickness for protective layer on the disk relative to the numerical aperture of the objective lens
JPH03205632A (ja) * 1990-11-26 1991-09-09 Sharp Corp 磁気光学記憶装置
JPH0652589B2 (ja) * 1990-11-27 1994-07-06 株式会社東芝 光学的情報記憶担体の製造方法
CA2071124A1 (en) * 1991-06-19 1992-12-20 Utami Yonemura Resin article having anti-static property
JP2672935B2 (ja) * 1993-12-27 1997-11-05 シャープ株式会社 磁気光学記憶素子
US5914915A (en) * 1995-02-03 1999-06-22 Sony Corporation Magneto-optical disk system having an objective lens with a numerical aperture related to the thickness of the protective layer
JPH08235641A (ja) * 1995-02-27 1996-09-13 Sony Corp 光学記録媒体とその製法
US5764619A (en) 1995-04-07 1998-06-09 Matsushita Electric Industrial Co., Ltd. Optical recording medium having two separate recording layers
EP0919058A1 (de) 1997-06-19 1999-06-02 Borden Chemical, Inc. Beschichtete optische platten
US20050238145A1 (en) * 2004-04-22 2005-10-27 Sbc Knowledge Ventures, L.P. User interface for "how to use" application of automated self service call center
EP1763878A2 (de) * 2004-06-28 2007-03-21 Koninklijke Philips Electronics N.V. Optisches datenspeichermedium und kombifolienabdeckung für seine herstellung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113179A (en) * 1957-11-22 1963-12-03 Gen Electric Method and apparatus for recording
US4057831A (en) * 1972-09-05 1977-11-08 U.S. Philips Corporation Video record disc manufactured by a process involving chemical or sputter etching
US3971874A (en) * 1973-08-29 1976-07-27 Matsushita Electric Industrial Co., Ltd. Optical information storage material and method of making it
FR2288370A1 (fr) * 1974-10-18 1976-05-14 Thomson Brandt Perfectionnements aux supports d'information a lecture optique
US4069487A (en) * 1974-12-26 1978-01-17 Canon Kabushiki Kaisha Recording member and process for recording
US4052280A (en) * 1975-11-06 1977-10-04 Scm Corporation Uv curing of polymerizable binders
DE2615605C2 (de) * 1976-04-09 1978-06-01 Polygram Gmbh, 2000 Hamburg Scheibenförmiger Informationsträger und Verfahren zu seiner Herstellung

Also Published As

Publication number Publication date
IT7830680A0 (it) 1978-12-07
AU4235778A (en) 1979-06-21
NL7713710A (nl) 1979-06-14
JPS5489704A (en) 1979-07-17
GB2009996A (en) 1979-06-20
SE7812634L (sv) 1979-06-13
IT1100796B (it) 1985-09-28
ES475871A1 (es) 1979-05-16
US4188433A (en) 1980-02-12
DE2853262A1 (de) 1979-06-13
ATA879778A (de) 1981-01-15

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